breakout71/src/levels_editor_util.ts

import {RawLevel} from "./types";

export function resizeLevel(level: RawLevel, sizeDelta: number) {
    const {size, bricks} = level
    const newSize = Math.max(1, size + sizeDelta)
    const newBricks = []
    for (let x = 0; x <  newSize; x++) {
        for (let y = 0; y <  newSize; y++) {
            newBricks[y * newSize + x] = brickAt(level, x, y )
        }
    }
    return {
        size: newSize,
        bricks: newBricks.join('')
    }
}

export function brickAt(level:RawLevel, x:number,y:number){
   return x>=0 && x < level.size && y>= 0 && y< level.size && level.bricks.split('')[y * level.size + x] || '_'
}

export function moveLevel(level: RawLevel, dx: number, dy: number) {
    const {size} = level
    const newBricks = new Array(size * size).fill('_')
    for (let x = 0; x < size; x++) {
        for (let y = 0; y < size; y++) {
            newBricks[y * size + x] = brickAt(level, x - dx, y - dy)
        }
    }
    return {
        bricks: newBricks.join('')
    }
}

export function setBrick(level: RawLevel, index: number, colorCode: string) {
    const {size} = level
    const newBricks=[]
    for (let x = 0; x < size; x++) {
        for (let y = 0; y < size; y++) {
            const brickIndex=y * size + x
            newBricks[brickIndex] = (brickIndex === index && colorCode ) || brickAt(level, x , y)
        }
    }
    return {
        bricks: newBricks.join('')
    }
}